.page-faq {
  --faq-card-bg: rgba(15, 43, 82, 0.6);
  --faq-card-line: rgba(58, 90, 127, 0.6);
  --faq-soft-shadow: 0 14px 28px rgba(2, 8, 18, 0.28);
  --faq-hot-bg: rgba(15, 43, 82, 0.6);
  color: var(--bright-white);
  background: var(--deep-blue);
  font-family: var(--font-body);
}

.page-faq .faq-browser {
  background: var(--deep-blue);
}

.page-faq .faq-hero {
  position: relative;
  padding: 40px 24px 64px;
  background: linear-gradient(135deg, var(--deep-blue) 0%, var(--abyss-blue) 72%, var(--sapphire-blue) 130%);
  border-bottom: 1px solid var(--line-blue);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(184, 255, 59, 0.16) 1px, transparent 1.2px);
  background-size: 24px 24px;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -18px;
  height: 36px;
  background: var(--deep-blue);
  transform: skewY(-1.2deg);
  z-index: 0;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-w);
  margin-inline: auto;
}

.page-faq .breadcrumbs {
  margin-bottom: 28px;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 0.85rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--neon-green);
}

.page-faq .faq-hero h1 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.08;
  color: var(--bright-white);
}

.page-faq .faq-hero__accent {
  margin-left: 10px;
  font-size: 0.5em;
  color: var(--vibrant-orange);
  letter-spacing: 1px;
}

.page-faq .faq-hero__desc {
  max-width: 60ch;
  margin: 0 0 24px;
  color: var(--mist-blue);
  font-size: 1rem;
  line-height: 1.8;
}

.page-faq .faq-hot {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hot-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--line-blue);
  border-radius: 999px;
  background: var(--faq-hot-bg);
  color: var(--bright-white);
  font-size: 0.95rem;
  cursor: pointer;
  user-select: none;
  transition: all var(--duration) var(--ease-out);
}

.page-faq .faq-hot-tag:hover {
  border-color: var(--vibrant-orange);
  color: var(--vibrant-orange);
}

.page-faq .faq-hero__hint {
  margin: 22px 0 0;
  color: var(--mist-blue);
  font-size: 0.9rem;
}

.page-faq .faq-hero__hint kbd {
  padding: 2px 6px;
  border: 1px solid var(--line-blue);
  border-radius: 4px;
  background: rgba(15, 43, 82, 0.8);
  color: var(--bright-white);
  font-family: var(--font-data);
  font-size: 0.82rem;
}

.page-faq .faq-filter-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  white-space: nowrap;
  clip-path: inset(50%);
}

.page-faq .faq-group {
  display: block;
  padding: 56px 24px;
  background: transparent;
}

.page-faq .faq-group--data {
  background: linear-gradient(170deg, var(--indigo-purple) 0%, var(--deep-blue) 90%);
}

.page-faq .faq-group--device {
  background: linear-gradient(150deg, var(--abyss-blue) 0%, var(--deep-blue) 74%);
}

.page-faq #faq-filter-all:checked ~ .faq-group {
  display: block;
}

.page-faq #faq-filter-install:checked ~ .faq-group {
  display: none;
}

.page-faq #faq-filter-install:checked ~ .faq-group--install {
  display: block;
}

.page-faq #faq-filter-data:checked ~ .faq-group {
  display: none;
}

.page-faq #faq-filter-data:checked ~ .faq-group--data {
  display: block;
}

.page-faq #faq-filter-device:checked ~ .faq-group {
  display: none;
}

.page-faq #faq-filter-device:checked ~ .faq-group--device {
  display: block;
}

.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  align-items: start;
  max-width: var(--container-w);
  margin-inline: auto;
}

.page-faq .faq-index {
  padding: 24px;
  border: 1px solid var(--faq-card-line);
  border-radius: 12px;
  background: var(--faq-card-bg);
  box-shadow: var(--faq-soft-shadow);
}

.page-faq .faq-index__cat {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--neon-green);
}

.page-faq .faq-index__title {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--bright-white);
}

.page-faq .faq-index__count {
  margin: 0 0 18px;
  color: var(--mist-blue);
  font-size: 0.88rem;
}

.page-faq .faq-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__item {
  border-top: 1px solid var(--faq-card-line);
}

.page-faq .faq-index__item:first-child {
  border-top: 0;
}

.page-faq .faq-index__link {
  display: block;
  padding: 12px 4px;
  color: var(--mist-blue);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color var(--duration) var(--ease-out), padding-left var(--duration) var(--ease-out);
}

.page-faq .faq-index__link:hover {
  padding-left: 12px;
  color: var(--vibrant-orange);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--neon-green);
  outline-offset: 2px;
}

.page-faq .faq-index__more {
  display: inline-block;
  margin-top: 18px;
  border-bottom: 1px solid transparent;
  color: var(--neon-green);
  font-size: 0.92rem;
  text-decoration: none;
  transition: border-color var(--duration) var(--ease-out);
}

.page-faq .faq-index__more:hover {
  border-bottom-color: var(--neon-green);
}

.page-faq .faq-answers {
  display: grid;
  gap: var(--grid-gap);
}

.page-faq .faq-card {
  border: 1px solid var(--faq-card-line);
  border-radius: 12px;
  background: var(--faq-card-bg);
  box-shadow: var(--faq-soft-shadow);
  transition: border-color var(--duration) var(--ease-out);
}

.page-faq .faq-card[open] {
  border-color: rgba(184, 255, 59, 0.35);
}

.page-faq .faq-card__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 18px 20px;
  list-style: none;
  cursor: pointer;
}

.page-faq .faq-card__summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-card__num {
  font-family: var(--font-data);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  color: var(--neon-green);
}

.page-faq .faq-card__question {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--bright-white);
  transition: color var(--duration) var(--ease-out);
}

.page-faq .faq-card__summary:hover .faq-card__question {
  color: var(--vibrant-orange);
}

.page-faq .faq-card__icon {
  position: relative;
  width: 18px;
  height: 18px;
  opacity: 0.8;
  transition: transform var(--duration) var(--ease-out);
}

.page-faq .faq-card__icon::before,
.page-faq .faq-card__icon::after {
  content: "";
  position: absolute;
  background: var(--bright-white);
  transition: transform var(--duration) var(--ease-out);
}

.page-faq .faq-card__icon::before {
  top: 8px;
  left: 0;
  right: 0;
  height: 2px;
}

.page-faq .faq-card__icon::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
}

.page-faq .faq-card[open] .faq-card__icon::after {
  transform: scaleY(0);
}

.page-faq .faq-card__body {
  padding: 0 20px 20px;
  border-top: 1px solid rgba(58, 90, 127, 0.35);
  color: var(--mist-blue);
  font-size: 0.97rem;
  line-height: 1.8;
}

.page-faq .faq-card__body p {
  margin: 14px 0 0;
}

.page-faq .faq-card__body p:first-child {
  margin-top: 16px;
}

.page-faq .faq-card__body a {
  color: var(--neon-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-card__body strong {
  color: var(--bright-white);
  font-weight: 600;
}

.page-faq .faq-figure {
  margin: 18px 0 0;
  overflow: hidden;
  border: 1px solid var(--faq-card-line);
  border-radius: 10px;
  background: rgba(15, 43, 82, 0.55);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  color: var(--mist-blue);
  font-size: 0.86rem;
}

.page-faq .faq-support {
  position: relative;
  padding: 56px 24px 64px;
  overflow: hidden;
  background: linear-gradient(130deg, var(--wine-red) 0%, #5f1f2e 100%);
  color: var(--bright-white);
}

.page-faq .faq-support::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(234, 244, 255, 0.12) 1px, transparent 1.2px);
  background-size: 28px 28px;
  opacity: 0.4;
  pointer-events: none;
}

.page-faq .faq-support__inner,
.page-faq .faq-support__note {
  position: relative;
  max-width: var(--container-w);
  margin-inline: auto;
}

.page-faq .faq-support__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-faq .faq-support__kicker {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 0.85rem;
  letter-spacing: 3px;
  color: var(--neon-green);
}

.page-faq .faq-support h2 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.page-faq .faq-support__intro p {
  margin: 0 0 20px;
  color: rgba(234, 244, 255, 0.78);
  line-height: 1.8;
}

.page-faq .faq-support__intro .btn {
  margin-top: 4px;
}

.page-faq .faq-support__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
}

.page-faq .faq-contact-card {
  padding: 18px;
  border: 1px solid rgba(234, 244, 255, 0.2);
  border-radius: 10px;
  background: rgba(11, 29, 58, 0.3);
}

.page-faq .faq-contact-card__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 2px;
  color: var(--neon-green);
}

.page-faq .faq-contact-card__value {
  display: block;
  color: var(--bright-white);
  font-size: 0.95rem;
  line-height: 1.5;
  word-break: break-word;
}

.page-faq .faq-support__note {
  margin-top: 36px;
  color: rgba(234, 244, 255, 0.7);
  font-size: 0.9rem;
  line-height: 1.8;
}

.page-faq .faq-support__note a {
  color: var(--neon-green);
}

.page-faq:has(#faq-filter-all:checked) .faq-hot-tag[for="faq-filter-all"],
.page-faq:has(#faq-filter-install:checked) .faq-hot-tag[for="faq-filter-install"],
.page-faq:has(#faq-filter-data:checked) .faq-hot-tag[for="faq-filter-data"],
.page-faq:has(#faq-filter-device:checked) .faq-hot-tag[for="faq-filter-device"] {
  border-color: var(--vibrant-orange);
  background: var(--vibrant-orange);
  color: var(--deep-blue);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.18);
}

.page-faq:has(#faq-filter-all:focus-visible) .faq-hot-tag[for="faq-filter-all"],
.page-faq:has(#faq-filter-install:focus-visible) .faq-hot-tag[for="faq-filter-install"],
.page-faq:has(#faq-filter-data:focus-visible) .faq-hot-tag[for="faq-filter-data"],
.page-faq:has(#faq-filter-device:focus-visible) .faq-hot-tag[for="faq-filter-device"] {
  outline: 2px solid var(--neon-green);
  outline-offset: 3px;
}

@media (min-width: 860px) {
  .page-faq .faq-hero {
    padding: 64px 24px 88px;
  }

  .page-faq .faq-group {
    padding: 64px 24px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(230px, 0.32fr) 1fr;
    gap: 28px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-card__summary {
    gap: 18px;
    padding: 22px 26px;
  }

  .page-faq .faq-card__body {
    padding: 4px 26px 24px;
  }

  .page-faq .faq-card__question {
    font-size: 1.12rem;
  }

  .page-faq .faq-support__inner {
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: 48px;
  }

  .page-faq .faq-support__list {
    gap: 18px;
  }

  .page-faq .faq-support {
    padding: 72px 24px;
  }
}